409
FNCA52 TJSJ 271930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST WED MAY 27 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-280800-
SOUTHEAST COASTAL PLAINS-
330 PM AST WED MAY 27 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 40 30 10
TEMP (24H TREND) 74 (-1) 90 (+4) 74 90
RH % (24H TREND) 88 (+4) 54 (-6) 85 51
WIND 20FT/EARLY(MPH) E 14 E 14 E 13 E 13
WIND 20FT/LATE(MPH) E 13 E 17 E 11 SE 14
MIXING HGT(FT-AGL/MSL) 3870 4600
TRANSPORT WND (MPH) E 15 E 16
VENT RATE (KT-FT) 50310 64400
DISPERSION 5 5
DSI 5 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-280800-
SOUTHERN HILLS-
330 PM AST WED MAY 27 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 50 20 10
TEMP (24H TREND) 70 (-3) 87 (+6) 71 87
RH % (24H TREND) 94 (+3) 62 (-13) 92 62
WIND 20FT/EARLY(MPH) E 13 E 11 E 11 E 11
WIND 20FT/LATE(MPH) E 13 E 12 E 10 SE 12
MIXING HGT(FT-AGL/MSL) 4170 5250
TRANSPORT WND (MPH) E 14 SE 15
VENT RATE (KT-FT) 50040 68250
DISPERSION 5 5
DSI 4 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-280800-
NORTH COASTAL PLAINS-
330 PM AST WED MAY 27 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 10 40 20 60
TEMP (24H TREND) 73 (-2) 88 (+3) 73 90
RH % (24H TREND) 94 (+1) 62 (-13) 91 60
WIND 20FT/EARLY(MPH) E 19 E 14 E 12 E 13
WIND 20FT/LATE(MPH) E 12 E 18 SE 9 E 17
MIXING HGT(FT-AGL/MSL) 3500 4700
TRANSPORT WND (MPH) E 16 E 14
VENT RATE (KT-FT) 49000 56400
DISPERSION 5 5
DSI 5 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-280800-
NORTHERN HILLS-
330 PM AST WED MAY 27 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER CLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE NONE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 0 60 10 50
TEMP (24H TREND) 71 (-1) 87 (+3) 71 88
RH % (24H TREND) 95 (0) 64 (-11) 92 63
WIND 20FT/EARLY(MPH) E 17 E 13 E 10 E 11
WIND 20FT/LATE(MPH) E 10 E 16 SE 5 E 14
MIXING HGT(FT-AGL/MSL) 3630 5390
TRANSPORT WND (MPH) E 12 SE 10
VENT RATE (KT-FT) 36300 48510
DISPERSION 5 5
DSI 4 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-280800-
WEST COAST-
330 PM AST WED MAY 27 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER CLEAR PCLDY MCLEAR MCLEAR
PRECIP TYPE NONE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 50 10 20
TEMP (24H TREND) 73 (-1) 91 (+3) 74 91
RH % (24H TREND) 93 (+2) 61 (-8) 89 61
WIND 20FT/EARLY(MPH) E 12 E 13 E 13 E 13
WIND 20FT/LATE(MPH) E 10 E 13 E 11 SE 13
MIXING HGT(FT-AGL/MSL) 3770 4500
TRANSPORT WND (MPH) SE 10 SE 13
VENT RATE (KT-FT) 33930 49500
DISPERSION 5 5
DSI 4 6 4 5
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-280800-
EASTERN INTERIOR-
330 PM AST WED MAY 27 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 30 30
TEMP (24H TREND) 72 (-2) 87 (+5) 72 88
RH % (24H TREND) 95 (+1) 62 (-14) 93 60
WIND 20FT/EARLY(MPH) E 14 E 12 E 12 E 11
WIND 20FT/LATE(MPH) E 13 E 12 E 11 SE 13
MIXING HGT(FT-AGL/MSL) 3940 5440
TRANSPORT WND (MPH) E 15 SE 15
VENT RATE (KT-FT) 51220 70720
DISPERSION 5 5
DSI 4 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-280800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST WED MAY 27 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 40 30 60
TEMP (24H TREND) 69 (-3) 83 (+5) 69 85
RH % (24H TREND) 98 (+2) 66 (-15) 98 65
WIND 20FT/EARLY(MPH) E 12 E 11 E 10 E 10
WIND 20FT/LATE(MPH) E 11 E 11 E 9 E 12
MIXING HGT(FT-AGL/MSL) 3500 4010
TRANSPORT WND (MPH) E 17 SE 15
VENT RATE (KT-FT) 52500 52130
DISPERSION 5 5
DSI 6 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-280800-
CENTRAL MOUNTAIN RANGE-
330 PM AST WED MAY 27 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER CLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE NONE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 70 10 30
TEMP (24H TREND) 68 (-2) 86 (+6) 68 86
RH % (24H TREND) 95 (+1) 65 (-12) 92 64
WIND 20FT/EARLY(MPH) E 10 E 9 E 8 E 9
WIND 20FT/LATE(MPH) E 6 E 9 E 5 SE 9
MIXING HGT(FT-AGL/MSL) 4450 5830
TRANSPORT WND (MPH) E 9 SE 12
VENT RATE (KT-FT) 35600 58300
DISPERSION 5 5
DSI 2 6 2 5
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-280800-
CAYEY MOUNTAIN RANGE-
330 PM AST WED MAY 27 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 30 20
TEMP (24H TREND) 69 (-3) 83 (+5) 71 84
RH % (24H TREND) 99 (+1) 67 (-14) 96 67
WIND 20FT/EARLY(MPH) E 11 E 10 E 10 E 10
WIND 20FT/LATE(MPH) E 11 E 11 E 9 E 10
MIXING HGT(FT-AGL/MSL) 3750 4700
TRANSPORT WND (MPH) E 16 SE 15
VENT RATE (KT-FT) 52500 61100
DISPERSION 5 5
DSI 5 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-280800-
VIEQUES-
330 PM AST WED MAY 27 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 20 30 50
TEMP (24H TREND) 75 (-2) 89 (+2) 75 89
RH % (24H TREND) 89 (+2) 57 (-7) 88 58
WIND 20FT/EARLY(MPH) E 17 E 16 E 14 E 13
WIND 20FT/LATE(MPH) E 17 E 14 E 13 E 12
MIXING HGT(FT-AGL/MSL) 2760 2920
TRANSPORT WND (MPH) E 18 E 16
VENT RATE (KT-FT) 44160 40880
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-280800-
CULEBRA-
330 PM AST WED MAY 27 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 30 30 50
TEMP (24H TREND) 76 (-2) 89 (+2) 76 90
RH % (24H TREND) 91 (+5) 58 (-7) 91 58
WIND 20FT/EARLY(MPH) E 17 E 16 E 14 E 13
WIND 20FT/LATE(MPH) E 17 E 14 E 13 E 13
MIXING HGT(FT-AGL/MSL) 2960 2840
TRANSPORT WND (MPH) E 20 SE 17
VENT RATE (KT-FT) 50320 42600
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-280800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST WED MAY 27 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 40 20 0
TEMP (24H TREND) 74 (-2) 91 (+3) 75 92
RH % (24H TREND) 87 (+5) 50 (-7) 86 52
WIND 20FT/EARLY(MPH) E 17 E 18 E 17 E 18
WIND 20FT/LATE(MPH) E 14 SE 19 E 17 SE 19
MIXING HGT(FT-AGL/MSL) 4230 4680
TRANSPORT WND (MPH) SE 18 SE 21
VENT RATE (KT-FT) 67680 84240
DISPERSION 5 5
DSI 6 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-280800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST WED MAY 27 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 30 20 30 40
TEMP (24H TREND) 75 (-2) 87 (+2) 76 88
RH % (24H TREND) 91 (+2) 60 (-7) 91 60
WIND 20FT/EARLY(MPH) E 18 E 16 E 14 E 13
WIND 20FT/LATE(MPH) E 17 E 14 E 13 E 13
MIXING HGT(FT-AGL/MSL) 3070 2990
TRANSPORT WND (MPH) E 20 SE 18
VENT RATE (KT-FT) 52190 47840
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-280800-
ST CROIX-
330 PM AST WED MAY 27 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 30 30
TEMP (24H TREND) 75 (-2) 88 (+2) 78 89
RH % (24H TREND) 89 (+1) 61 (-7) 83 60
WIND 20FT/EARLY(MPH) E 17 E 14 E 13 E 13
WIND 20FT/LATE(MPH) E 16 E 14 E 13 E 13
MIXING HGT(FT-AGL/MSL) 4090 4330
TRANSPORT WND (MPH) E 18 SE 20
VENT RATE (KT-FT) 65440 73610
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
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